Taking the local weather in Mo-I-Rana into account can help you maximise your time at the pool during your trip. The hottest months are usually July and August, with an average temperature of 11°C, while the coldest months are January and February, with an average of -6°C. The rainiest months in Mo-I-Rana are March, January, September and December, with each month seeing an average of 203 mm of rainfall.